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D-Series NEMA 4 Differential Pressure Switch

Brand: Ashcroft Inc
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The Ashcroft® D4 Differential Pressure Switch is designed for use on most applications requiring reliability and long-cycle life.

Ideal for satisfying requirements for pressure control, shutdown or alarm operations.

Specifications:
  • Accuracy: ±1.00% full scale
  • NEMA 4X (IP66) aluminum enclosure
  • Single setpoint
  • Differential pressure ranges: 10" IWD to 600 psid
  • SPDT or DPDT switching option
Features
  • Adjustable setpoints from 15-100% of range 
  • Fixed or limited adjustable deadband 
  • Wide selection of switch elements and wetted materials 
  • Specials designs for NACE and fire-safe applications
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The Ashcroft® D4 Differential Pressure Switch is designed for use on most applications requiring reliability and long-cycle life.

Ideal for satisfying requirements for pressure control, shutdown or alarm operations.

Specifications:
  • Accuracy: ±1.00% full scale
  • NEMA 4X (IP66) aluminum enclosure
  • Single setpoint
  • Differential pressure ranges: 10" IWD to 600 psid
  • SPDT or DPDT switching option
Features
  • Adjustable setpoints from 15-100% of range 
  • Fixed or limited adjustable deadband 
  • Wide selection of switch elements and wetted materials 
  • Specials designs for NACE and fire-safe applications
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Specifications

Brand

Options

  • Fungus Proofing
  • Paper Tag
  • Stainless Steel Tags

Pressure Range

  • bar: 1.034 to 41.37
  • Inches WC: 30 to 150
  • kPa: 103.4 to 4,137
  • psid: 15 to 600

O-Ring Material

  • Buna-N
  • Teflon
  • Viton

Electrical - Free Leads

  • 16” (41 cm) Free Leads

Mounting

  • 2” Pipe Mounting Bracket
  • Wall Mounting Bracket (”H 2O)

Proof Pressure

  • bar: 137.9 to 413.7
  • Inches WC: 21.6
  • kPa: 13,790 to 41,370
  • psi: 2,000 to 8,000

Element

  • Ammonia Service
  • Dual Elements
  • General-purpose
  • Heavy Duty AC
  • Heavy Duty DC
  • Hermetic Seal Switch, General-purpose
  • Hermetic Seal Switch, Narrow Deadband
  • Hermetic Seal, Gold Contacts
  • High Temperature 149° C (300° F)
  • Low Level (Gold Contacts)
  • Manual Reset on Decreasing Pressure
  • Manual Reset on Increasing Pressure
  • Narrow Deadband
  • Sealed Environment Proof

Electrical Contacts

  • Gold

Environmental Protection

  • IP54
  • IP66
  • NEMA 13
  • NEMA 3, 4, 4X, 13 / IP54, 66
  • NEMA 4
  • NEMA 4X

Diaphragm Material

  • Buna-N
  • Monel
  • Stainless Steel
  • Teflon
  • Viton

Electrical Connectors

  • 3/4” NPT Female
  • M20 Male

NPT Connection

  • 1/2” NPT Female
  • 1/2” NPT Male
  • 1/4” NPT Female

Deadband, Approximate

  • bar: 0.03 to 14.48
  • kPa: 3.45 to 1,448
  • psid: 0.5 to 210

Switch Type

  • 2 SPDT
  • SPDT

Set Point - Increasing

  • 30” WC to 600 psid
  • bar: 1.034 to 41.37
  • Inches WC: 30 to 150
  • kPa: 103.4 to 4,137
  • psid: 15 to 600

Enclosure, Body Material

  • 316 Stainless Steel
  • Aluminum

Operating Temperature

  • -29° to 66° C (-20° to 150° F)

Approvals & Certifications

  • CSA
  • FM
  • UL

Set Point - Decreasing

  • 30” WC to 600 psid
  • bar: 1.034 to 41.37
  • Inches WC: 30 to 150
  • kPa: 103.4 to 4,137
  • psid: 15 to 600

Electrical Rating

  • 1 A at 125/250 Vac
  • 10 A, 125 / Vac or DC, 1/8 hp 125 Vac or DC
  • 11 A, 125/250 Vac, 5 A, 30 Vdc
  • 15 A, 125/250 Vac
  • 15 A, 125/250/480 Vac, 1/2 A, 125 Vdc, 1/4 A, 250 Vdc
  • 5 A at 125/250 Vac

Adjustment Type

  • Factory Set (Pre-Set)
  • Field Adjustable
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Applications

  • Corrosive Environments
  • Offshore Platforms, Pipelines
  • Power Plants
  • Pulp & Paper
  • Refining, Chemical, Petrochemical
  • Steel Mills
  • Water Treatment
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